Broadcasting nothing as rain spread (2,3)
I believe the answer is:
on air
'broadcasting' is the definition.
(broadcasting on the air)
'nothing as rain spread' is the wordplay.
I cannot really see how this works, but
'nothing' could be 'o' (looks like zero - 0) and 'o' is located in the answer.
an anagram of 'rain' is 'nair' which is within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for on air that I've seen before include "Broadcasting at this moment" , "Walk in delight here" , "If you're really happy, you'll float here" , "In the process of broadcasting - floating aloft?" , "(Walking) elatedly" .)